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Software failure:

1: Read the instructions. Have you set some related settings? If you can't find them, please go back to the factory settings and see if it can be solved.

2: brush the machine. . . A: Soft grid machine: It may be a problem that the system is unstable and leads to system confusion. B: the brush system is unstable. Reinstallation of the system is recommended.

3: Memory card. . . Whether the gold finger of your mobile phone memory card is in poor contact, take it out and get an eraser. . . Or take out the memory card to test the machine. . .

4: virus. . . Your mobile phone is infected with a virus. Let's kill the virus first.

hardware fault

After troubleshooting the software, the problem remains unresolved. Did you trip over your mobile phone? It may be that the signal receiver is open-circuited and welded, or there are other problems. Then it should be repaired. If you see antenna welding, you can do it yourself. If there is no problem of soldering and virtual connection after opening the mobile phone, you can only go to the place where the mobile phone is repaired.

I can only help you so much. . Good luck! ! ! ! ! ! ! ! !